Home / 136,345.81-188,164.97-81,914.63

Finding the Fourth Proportional to 136,345.81, 188,164.97 and 81,914.63

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Solution

The fourth proportional to 136,345.81, 188,164.97 and 81,914.63 is: 113,046.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,345.81 : 188,164.97 = 81,914.63 : x
  2. Step 2: Convert to fraction form
    136,345.81/188,164.97 = 81,914.63/x
  3. Step 3: Cross multiply
    136,345.81x = 188,164.97 × 81,914.63
  4. Step 4: Simplify right side
    136,345.81x = 15,413,463,896.51
  5. Step 5: Solve for x
    x = 15,413,463,896.51/136,345.81
  6. Step 6: Final answer
    x = 113,046.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.